Malicious PDF — malware analysis report

Static analysis result for SHA-256 e41927ebd75556f4…

MALICIOUS

PDF

73.0 KB Created: 2021-02-03 03:00:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 57ffa59e77c7546d619ba84bae156336 SHA-1: 9fabf4499b0e90091d3708125d623a4b7dfbb392 SHA-256: e41927ebd75556f4fe37fdd45ff422e4e36454dbb82242311bed880f1a9c8f2f
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://baarspo.ru/aws?utm_term=counter+strike+source+mods+zombie+free PDF link annotation
    • http://sunshop.pro/videos_tiktok_teluguyujcr.pdfIn PDF document text
    • https://bowetupivivuz.weebly.com/uploads/1/3/1/4/131437724/xixarixez_xepasuluxufe.pdfIn PDF document text
    • https://gejowarog.weebly.com/uploads/1/3/2/7/132740172/d2fbb6.pdfIn PDF document text
    • https://tefegori.weebly.com/uploads/1/3/1/6/131637168/559d7a5bc3d112.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446285/normal_600bba5781d2b.pdfIn PDF document text
    • https://tazuwadafif.weebly.com/uploads/1/3/4/8/134857375/4806499.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/nomafisesurazitezovamemu.pdfIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/logewoti.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/equifax_business_credit_report_phone_number.pdfIn PDF document text
    • https://s3.amazonaws.com/gekixadonuru/lotilovopurakezodeziv.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/zogir.pdfIn PDF document text
    • https://s3.amazonaws.com/kosamupim/nodur.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/application_format_in_english_for_college.pdfIn PDF document text
    • https://s3.amazonaws.com/buwosevax/hollow_knight_grimm_troupe_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/rixevozajixezos/barir_kache_arshinagar_song.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e36f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE36F 5084 bytes
SHA-256: c4c8a61b879f4f8b356f738ec8481d1dc40a9c10e61df234e33ec983876bd34d
font_01_sfnt_off0000f4af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AF 10240 bytes
SHA-256: af7f9033906a7ccd86df76faeef6a9f92e609961b9cf9b4b280aac23efb4926a